CN108859323B - Aluminum-wood composite multilayer functional board and preparation method thereof - Google Patents

Aluminum-wood composite multilayer functional board and preparation method thereof Download PDF

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Publication number
CN108859323B
CN108859323B CN201810764908.8A CN201810764908A CN108859323B CN 108859323 B CN108859323 B CN 108859323B CN 201810764908 A CN201810764908 A CN 201810764908A CN 108859323 B CN108859323 B CN 108859323B
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aluminum
hot pressing
rotary
board
preparation
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CN108859323A (en
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杨红旗
李江晓
王寒烨
杨沁雅
陈广辉
杨亚峰
李山
武轲
徐兰兰
李普宪
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Henan Agricultural University
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Henan Agricultural University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/10—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/162—Cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
    • C09J161/04—Condensation polymers of aldehydes or ketones with phenols only
    • C09J161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B32B2038/0016—Abrading
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/212—Electromagnetic interference shielding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)
  • Floor Finish (AREA)

Abstract

The invention relates to the technical field of preparation of functional boards, and discloses an aluminum-wood composite multilayer functional board and a preparation method thereof, wherein the preparation method comprises the following steps: polishing the surfaces of the medium-density fiberboard and the rotary-cut wood veneer; polishing the surface of the aluminum foil, cleaning and drying; respectively weighing phenolic resin, polyvinyl acetate emulsion and purified water, and uniformly mixing in a container; respectively gluing adhesives on the polished surfaces of the two aluminum foils, the medium-density fiberboard and the rotary-cut wood veneer; drying the adhesive on the polished surface until the adhesive is transparent; assembling the rotary cut wood veneer, the aluminum foil, the medium-density fiberboard, the aluminum foil and the rotary cut wood veneer in sequence; cold pressing and pre-pressing for 5 minutes; and (5) carrying out hot pressing, taking out the plate after the hot pressing is finished, and naturally cooling to room temperature. The aluminum-wood composite multilayer functional board and the preparation method thereof improve the physical and mechanical properties of the plywood, reduce the production cost of the board and reduce the energy consumption of the board.

Description

Aluminum-wood composite multilayer functional board and preparation method thereof
Technical Field
The invention relates to the technical field of preparation of functional boards, in particular to an aluminum-wood composite multilayer functional board and a preparation method thereof.
Background
The price of high-quality wood is rapidly increased due to the annual reduction of the yield of the logs in the world in recent years, the limit of various countries on the export of the logs and the increasing demand of markets on solid wood products; and along with the continuous improvement of the living standard of people, the demand of wood materials is continuously increased, and more requirements are put forward on the functionality of the wood materials. The multilayer solid wood composite artificial board is a novel plywood newly developed in recent years, has beautiful and natural color and texture of solid wood boards, is warm and suitable for people, and is widely applied to wood floors, furniture and building decoration materials. However, due to the drawbacks of the wood material itself: the defects of dry shrinkage, wet swelling, easy combustion, poor waterproofness, poor weather resistance and the like narrow the application range.
The wood board and the metal aluminum foil are two materials with different properties, the difference of linear thermal expansion coefficients is about 4 times, the shrinkage expansion rates of the wood board and the metal aluminum foil are considered during hot pressing preparation, a tough adhesive is adopted, the hot pressing temperature is controlled within a lower range, and the phenomena that after hot pressing is finished, the bonding failure, the bonding strength is low and the composite material is deformed due to large internal stress generated by material shrinkage are prevented. The adhesive adopted by the traditional metal veneering plate is expensive, the surface treatment and hot-pressing composite process of the material is complex, and the energy consumption is high; the cold pressing period is long, the production efficiency is low, the equipment investment is large, the price of the aluminum-wood composite multilayer functional board is high, and the popularization and the application of the aluminum-wood composite multilayer functional board are limited.
Disclosure of Invention
The invention provides an aluminum-wood composite multilayer functional board and a preparation method thereof, which can solve the problems in the prior art.
The invention provides a preparation method of an aluminum-wood composite multilayer functional board, which comprises the following steps:
the preparation method of the aluminum-wood composite multilayer functional board is characterized by comprising the following steps:
s1, polishing the upper and lower surfaces of the medium-density fiberboard with the thickness of 9mm +/-0.5 mm by using No. 120 dry grinding abrasive paper, wiping the surface by using absorbent cotton yarn, and cleaning the surface by wind;
s2, polishing the single surfaces of two rotary-cut wooden single plates with the thickness of 3mm +/-0.5 mm by using No. 120 dry grinding abrasive paper, wiping the single surfaces by using absorbent cotton yarns, and cleaning the single surfaces by wind;
s3, polishing the upper and lower surfaces of two aluminum foils with the thickness of 0.2mm by 180# water abrasive paper, degreasing by using degreasing fluid, washing by using purified water, and drying in convection air at 40-50 ℃;
s4 production of adhesive
Respectively weighing phenolic resin with the solid content of 48%, the viscosity of 100mPa.s and the pH value of 8.9, polyvinyl acetate emulsion with the solid content of 43% and the pH value of 6.1 and purified water, wherein the mass ratio of the polyvinyl acetate emulsion to the purified water is 4: 3: 2;
adding purified water into the polyvinyl acetate emulsion, and stirring until the emulsion is completely and uniformly dispersed to obtain diluted polyvinyl acetate emulsion;
slowly adding phenolic resin into the diluted polyvinyl acetate emulsion, gradually increasing the stirring speed along with the increase of the viscosity of the added mixture of the phenolic resin until the phenolic resin is uniformly dispersed, and stopping stirring to obtain a mixture A;
adding KH-550 coupling agent with the mass of 2% of the mixture A, and uniformly stirring;
static defoaming is carried out under vacuum;
the prepared adhesive finishes gluing within 2 hours;
s5, respectively coating adhesives on the polished surfaces of the two aluminum foils, the medium-density fiberboard and the two rotary-cut wood veneers by using a roller coating type glue spreader, wherein the single-surface gluing amount is 200g/m2；
S6, drying the adhesive on the polished surface under 40-50 ℃ convection air until the adhesive is transparent;
s7, assembling the rotary cut wood veneer, the aluminum foil, the medium-density fiberboard, the aluminum foil and the rotary cut wood veneer in sequence;
s8, pre-pressing the assembled plate blank in a cold press with the pressure of 0.2MPa for 5 minutes to compact the structure of the plate blank and remove residual air in the plate blank;
s9, putting the pre-pressed plate blank into a hot press for hot pressing, wherein the hot pressing parameters are that the hot pressing temperature is 130-140 ℃, the hot pressing time is 9-15 min, and the hot pressing pressure is 0.8-1.0 MPa;
s10, after the hot pressing is finished, taking out the plate from the hot press, and naturally cooling to room temperature;
and S11, finishing the surface and the edge of the plate, and detecting and warehousing.
The sanding in the steps S1, S2 and S3 uses a belt sandpaper sander.
In the step S3, a water-mill sander is used for sanding.
In the step S3, an electric heating constant temperature air blowing drying oven is adopted for drying.
The stirring in the step S4 uses an infinitely variable speed timer electric stirrer.
And in the step S5, a full-automatic single-sided and double-sided roller type glue spreader is adopted for glue coating.
An aluminum-wood composite multilayer functional board is prepared by the method.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts toughness resin polyvinyl acetate emulsion modified phenolic resin as adhesive, adopts a simple mechanical polishing, degreasing and water cleaning wood rotary-cut veneer and aluminum foil surface treatment method, and a hot pressing process combining cold pressing prepressing and hot pressing fast-yielding, and a preparation method for rapidly preparing the aluminum-wood composite multilayer functional board, improves and improves the performance of wood plywood boards, endows the boards with new functions, reduces the production cost of the boards, reduces the energy consumption of the boards, and promotes the development of wood boards and metal board composite artificial technology. The rotary-cut wood veneer is used as a surface layer plate, the medium-density fiberboard is used as a base layer plate, the aluminum foil is used as a functional plate, the aluminum foil is positioned below the rotary-cut wood veneer on the surface and bottom surfaces, and the aluminum-wood composite multilayer functional plate is prepared by innovative hot pressing.
Drawings
FIG. 1 is a schematic structural diagram of an aluminum-wood composite multilayer functional board prepared by the present invention.
Description of reference numerals:
1-rotary cutting of a wood veneer, 2-aluminum foil and 3-medium density fiberboard.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
Example one
As shown in fig. 1, a method for preparing an aluminum-wood composite multilayer functional board comprises the following steps:
s1, polishing the upper surface and the lower surface of a medium-density fiberboard with the thickness of 9mm by using No. 120 dry grinding abrasive paper, wiping by using absorbent cotton yarn, and cleaning by air;
s2, polishing the single surfaces of two rotary-cut wooden single plates with the thickness of 3mm by using No. 120 dry grinding abrasive paper, wiping by using absorbent cotton yarn, and airing;
s3, polishing the upper and lower surfaces of two aluminum foils with the thickness of 0.2mm by 180# water abrasive paper, degreasing by using degreasing fluid, washing by using purified water, and drying in convection air at 50 ℃;
s4 production of adhesive
Respectively weighing phenolic resin with the solid content of 48 percent, the viscosity of 100mPa.s and the pH value of 8.9, polyvinyl acetate emulsion with the solid content of 43 percent and the pH value of 6.1 and purified water, wherein the mass ratio of the polyvinyl acetate emulsion to the purified water is 4: 3: 2;
adding purified water into the polyvinyl acetate emulsion, and stirring until the emulsion is completely and uniformly dispersed to obtain diluted polyvinyl acetate emulsion;
slowly adding phenolic resin into the diluted polyvinyl acetate emulsion, gradually increasing the stirring speed along with the increase of the viscosity of the added mixture of the phenolic resin until the phenolic resin is uniformly dispersed, and stopping stirring to obtain a mixture A;
adding KH-550 coupling agent with the mass of 2% of the mixture A, and uniformly stirring;
static defoaming is carried out under vacuum;
the prepared adhesive finishes gluing within 2 hours;
s5, respectively coating adhesives on the polished surfaces of the two aluminum foils, the medium-density fiberboard and the two rotary-cut wood veneers by using a roller coating type glue spreader, wherein the single-surface gluing amount is 200g/m2；
S6, drying the adhesive on the polished surface under 50 ℃ convection air until the adhesive is transparent;
s7, assembling the rotary cut wood veneer, the aluminum foil, the medium-density fiberboard, the aluminum foil and the rotary cut wood veneer in sequence;
s8, pre-pressing the assembled plate blank in a cold press with the pressure of 0.2MPa for 5 minutes to compact the structure of the plate blank and remove residual air in the plate blank;
s9, putting the pre-pressed plate blank into a hot press for hot pressing, wherein the hot pressing parameters are that the hot pressing temperature is 140 ℃, the hot pressing time is 9min, and the hot pressing pressure is 1.0 MPa;
s10, after the hot pressing is finished, taking out the plate from the hot press, and naturally cooling to room temperature;
and S11, finishing the surface and the edge of the plate, and detecting and warehousing.
Example two
A preparation method of an aluminum-wood composite multilayer functional board comprises the following steps:
s1, polishing the upper surface and the lower surface of a medium-density fiberboard with the thickness of 9mm by using No. 120 dry grinding abrasive paper, wiping by using absorbent cotton yarn, and cleaning by air;
s2, polishing the single surfaces of two rotary-cut wooden single plates with the thickness of 3mm by using No. 120 dry grinding abrasive paper, wiping by using absorbent cotton yarn, and airing;
s3, polishing the upper and lower surfaces of two aluminum foils with the thickness of 0.2mm by 180# water abrasive paper, degreasing by using degreasing fluid, washing by using purified water, and drying in convection air at 40-50 ℃;
s4 production of adhesive
Respectively weighing phenolic resin with the solid content of 48 percent, the viscosity of 100mPa.s and the pH value of 8.9, polyvinyl acetate emulsion with the solid content of 43 percent and the pH value of 6.1 and purified water, wherein the mass ratio of the polyvinyl acetate emulsion to the purified water is 4: 3: 2;
adding purified water into the polyvinyl acetate emulsion, and stirring until the emulsion is completely and uniformly dispersed to obtain diluted polyvinyl acetate emulsion;
slowly adding phenolic resin into the diluted polyvinyl acetate emulsion, gradually increasing the stirring speed along with the increase of the viscosity of the added mixture of the phenolic resin until the phenolic resin is uniformly dispersed, and stopping stirring to obtain a mixture A;
adding KH-550 coupling agent with the mass of 2% of the mixture A, and uniformly stirring;
static defoaming is carried out under vacuum;
the prepared adhesive finishes gluing within 2 hours;
s5, respectively coating adhesives on the polished surfaces of the two aluminum foils, the medium-density fiberboard and the two rotary-cut wood veneers by using a roller coating type glue spreader, wherein the single-surface gluing amount is 200g/m2；
S6, drying the adhesive on the polished surface under 40-50 ℃ convection air until the adhesive is transparent;
s7, assembling the rotary cut wood veneer, the aluminum foil, the medium-density fiberboard, the aluminum foil and the rotary cut wood veneer in sequence;
s8, pre-pressing the assembled plate blank in a cold press with the pressure of 0.2MPa for 5 minutes to compact the structure of the plate blank and remove residual air in the plate blank;
s9, putting the pre-pressed plate blank into a hot press for hot pressing, wherein the hot pressing parameters are that the hot pressing temperature is 130 ℃, the hot pressing time is 15min, and the hot pressing pressure is 0.8 MPa.
S10, after the hot pressing is finished, taking out the plate from the hot press, and naturally cooling to room temperature;
and S11, finishing the surface and the edge of the plate, and detecting and warehousing.
The medium-density fiberboard is an artificial board prepared by taking wood fibers or other plant fibers as raw materials, crushing, separating fibers, drying, applying urea-formaldehyde resin or other suitable adhesives, and then carrying out hot pressing. The density is generally 500-880kg/m3The thickness is generally in the range of 5 to 30 mm.
The invention adopts toughness resin polyvinyl acetate emulsion modified phenolic resin as adhesive, adopts a surface treatment method of simple mechanical polishing and degreasing and water purification, and a hot pressing process combining cold pressing prepressing and hot pressing fast-discharging, and a preparation method of the aluminum-wood composite multilayer functional board is quickly prepared, thereby improving and improving the performance of the wood plywood board, endowing the board with new functions, reducing the production cost of the board, reducing the energy consumption of the board, and promoting the development of the composite artificial technology of the wood board and the metal board.
The rotary-cut wood veneer is used as a surface layer plate, the medium-density fiberboard is used as a base layer plate, the aluminum foil is used as a functional plate, the aluminum foil is positioned below the rotary-cut wood veneer on the surface and bottom surfaces, and the aluminum-wood composite multilayer functional plate is prepared by innovative hot pressing.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.

Claims (4)

1. The preparation method of the aluminum-wood composite multilayer functional board is characterized by comprising the following steps:
s1, polishing the upper and lower surfaces of the medium-density fiberboard with the thickness of 9mm +/-0.5 mm by using No. 120 dry grinding abrasive paper, wiping the surface by using absorbent cotton yarn, and cleaning the surface by wind;
s2, polishing the single surfaces of two rotary-cut wooden single plates with the thickness of 3mm +/-0.5 mm by using No. 120 dry grinding abrasive paper, wiping the single surfaces by using absorbent cotton yarns, and cleaning the single surfaces by wind;
s3, polishing the upper and lower surfaces of two aluminum foils with the thickness of 0.2mm by 180# water abrasive paper, degreasing by using degreasing fluid, washing by using purified water, and drying in convection air at 40-50 ℃;
s4 production of adhesive
Respectively weighing phenolic resin with the solid content of 48%, the viscosity of 100mPa.s and the pH value of 8.9, polyvinyl acetate emulsion with the solid content of 43% and the pH value of 6.1 and purified water, wherein the mass ratio of the polyvinyl acetate emulsion to the purified water is 4: 3: 2;
adding purified water into the polyvinyl acetate emulsion, and stirring until the emulsion is completely and uniformly dispersed to obtain diluted polyvinyl acetate emulsion;
slowly adding phenolic resin into the diluted polyvinyl acetate emulsion, gradually increasing the stirring speed along with the increase of the viscosity of the added mixture of the phenolic resin until the phenolic resin is uniformly dispersed, and stopping stirring to obtain a mixture A;
adding KH-550 coupling agent with the mass of 2% of the mixture A, and uniformly stirring;
static defoaming is carried out under vacuum;
the prepared adhesive finishes gluing within 2 hours;
s5, respectively coating adhesives on the polished surfaces of the two aluminum foils, the medium-density fiberboard and the two rotary-cut wood veneers by using a roller coating type glue spreader, wherein the single-surface gluing amount is 200g/m2；
S6, drying the adhesive on the polished surface under 40-50 ℃ convection air until the adhesive is transparent;
s7, assembling the rotary cut wood veneer, the aluminum foil, the medium-density fiberboard, the aluminum foil and the rotary cut wood veneer in sequence;
s8, pre-pressing the assembled plate blank in a cold press with the pressure of 0.2MPa for 5 minutes to compact the structure of the plate blank and remove residual air in the plate blank;
s9, putting the pre-pressed plate blank into a hot press for hot pressing, wherein the hot pressing parameters are as follows: the hot pressing temperature is 130-140 ℃, the hot pressing time is 9-15 min, and the hot pressing pressure is 0.8-1.0 MPa;
s10, after the hot pressing is finished, taking out the plate from the hot press, and naturally cooling to room temperature;
s11, finishing the surface and the edge of the plate, and detecting and warehousing;
the steps S1 and S2 are both performed by using a belt type sander;
in the step S3, a water-grinding sander is used for sanding;
in the step S3, an electric heating constant temperature air blowing drying oven is adopted for drying.
2. The method for preparing the aluminum-wood composite multilayer functional board as claimed in claim 1, wherein the stirring in the step S4 uses an infinitely variable speed timed electric stirrer.
3. The method for preparing the aluminum-wood composite multilayer functional board as claimed in claim 1, wherein the step S5 is performed by a full-automatic single-sided and double-sided roller coater.
4. The utility model provides a compound multilayer function board of aluminum-wood which characterized in that: prepared by the method of any one of claims 1 to 3.
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CN110053108A (en) * 2019-05-05 2019-07-26 河南农业大学 A kind of aluminium foil enhancing functional form fiberboard and preparation method
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CN113308651A (en) * 2021-04-15 2021-08-27 张家港市旭德铝制品有限公司 Manufacturing method of ultrathin aluminum composite section
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